-45.06% is the change from 830 to 456
Calculation steps:
[( 456 - 830 ) ÷ 830] x 100 = -45.06%
Formula
Percentage change = [(456 - 830) / 830] x 100
Subtract the new number by the original number
456 - 830 = -374
-374 ÷ 830 = -0.4506024096385542
-0.4506024096385542 x 100 = -45.06%